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Contrast ratio results for Benq BL902LED_DSUB

Contrast ratio 3786:1
Monitor model Benq BL902LED_DSUB
Submitted 22 Oct 2011 15:55 CEST, by 95.54.*.*
Camera model Panasonic DMC-LS80
Processing remarks

Warning: image file 1: Underexposed. Please increase the shutter time.
Note: image file 1: suggested exposure time: 14.7 s (Set EV to +6.9)
image file 2: Note: image seems to be noisy. Try reducing the ISO setting or increasing the exposure time.
Note: image file 2: suggested exposure time: 1/100 s (Set EV to -0.8)
image file 3: Warning: image includes screen edges or something that's not a monitor. Hold the camera close to the screen.
Warning: image file 3: Overexposed. Please decrease the shutter time.
Note: image file 3: suggested exposure time: 1/72 s (Set EV to -0.3)
Warning: Image ISO settings are not the same.
Warning: image file 3 is too bright to be a dark photo. Maybe you mixed up the files?

Black
Screen photo
[open image]
Luminance 0.02 cd/m2
Luminance spread 0.01 cd/m2 (2 standard deviations)
Exposure value –8.38 stops   (aim for –2 to –3)
Exposure spread 0.57 stops
Area used for calculation 0.477 x 0.477
Camera settings Exposure time: 1/4   ISO: 400   F-number: 2.8
Focal length: 33 mm   (35 mm equivalent)
Exposure compensation: 1
White
Screen photo
[open image]
Luminance 76 cd/m2
Luminance spread 17 cd/m2 (2 standard deviations)
Exposure value –0.72 stops   (aim for –2 to –3)
Exposure spread 0.33 stops
Area used for calculation 0.477 x 0.477
Camera settings Exposure time: 1/30   ISO: 160   F-number: 2.8
Focal length: 33 mm   (35 mm equivalent)
Exposure compensation: 1
Black at screen edge
Screen photo
[open image]
Luminance 27 cd/m2
Luminance spread 58 cd/m2 (2 standard deviations)
Exposure value –1.24 stops   (aim for –2 to –3)
Exposure spread 4.25 stops
Area used for calculation 0.477 x 0.477
Camera settings Exposure time: 1/30   ISO: 320   F-number: 2.8
Focal length: 33 mm   (35 mm equivalent)
Exposure compensation: 1

The luminance values in cd/m2 are not very reliable, since camera sensitivities can easily differ up to 50% from their nominal value. Typically, the real luminance is 30% lower than this number. The area used for calculation is chosen such that it corresponds to a viewing angle of ±14° horizontally and ±10.5° vertically, which is equivalent to viewing the screen from a distance of about 1.5 times the diagonal size.

Unfortunately, there is a lot of variation in how cameras use EXIF settings. If photos from your camera your produce unusable results, try coming back in a few days. I review submitted pictures regularly and try to fix problems.